CAN的过滤寄存器

Posted 2021-05-25 旭日初扬

一、结构体函数与寄存器

typedef struct
{
  uint16_t CAN_FilterIdHigh;         /*!< Specifies the filter identification number (MSBs for a 32-bitconfiguration, first one for a 16-bit configuration).This parameter can be a value between 0x0000 and 0xFFFF */

                                                             指定寄存器的标识号 （32位配置的msb，第一个是16位配置的msb）  这个参数的取值在0x0000到0xFFFF之间        

uint16_t CAN_FilterIdLow;          /*!< Specifies the filter identification number (LSBs for a 32-bit configuration, second one for a 16-bit configuration).This parameter can be a value between 0x0000 and 0xFFFF */

                                                           指定过滤器标识号(32位配置的lsb, 16位配置的第二个lsb)。取值范围为0x0000 ~ 0xFFFF

  uint16_t CAN_FilterMaskIdHigh;     /*!< Specifies the filter mask number or identification number,according to the mode (MSBs for a 32-bit configuration,first one for a 16-bit configuration).This parameter can be a value between 0x0000 and 0xFFFF */

                                                            根据模式(32位配置的msb，第一个是16位配置的msb)，指定过滤器掩码号或识别号。取值范围为0x0000 ~ 0xFFFF

  uint16_t CAN_FilterMaskIdLow;      /*!< Specifies the filter mask number or identification number,  according to the mode (LSBs for a 32-bit configuration,second one for a 16-bit configuration).This parameter can be a value between 0x0000 and 0xFFFF */

                                                             根据模式(32位配置的lsb(高16位), 16位配置的第二个lsb（低16位）)指定过滤掩码号或识别号。取值范围为0x0000 ~ 0xFFFF

  uint16_t CAN_FilterFIFOAssignment; /*!< Specifies the FIFO (0 or 1) which will be assigned to the filter.This parameter can be a value of @ref CAN_filter_FIFO */'

                                                             指定将分配给过滤器的FIFO(0或1)。该参数可以是@ref CAN_filter_FIFO的值
  
  uint8_t CAN_FilterNumber;          /*!< Specifies the filter which will be initialized. It ranges from 0 to 13. */

                                                            指定将被初始化的筛选器。取值范围是0 ~ 13

  uint8_t CAN_FilterMode;            /*!< Specifies the filter mode to be initialized. This parameter can be a value of @ref CAN_filter_mode */

                                                               指定要初始化的筛选器模式。该参数可以是@ref CAN_filter_mode

  uint8_t CAN_FilterScale;           /*!< Specifies the filter scale. This parameter can be a value of @ref CAN_filter_scale */

                                                               指定筛选器比例。该参数可以是@ref CAN_filter_scale

  FunctionalState CAN_FilterActivation; /*!< Enable or disable the filter.  This parameter can be set either to ENABLE or DISABLE. */

                                                                启用或禁用过滤器。该参数可设置为“启用”或“禁用”。
} CAN_FilterInitTypeDef;

typedef struct
{
  __IO uint32_t MCR;
  __IO uint32_t MSR;
  __IO uint32_t TSR;
  __IO uint32_t RF0R;
  __IO uint32_t RF1R;
  __IO uint32_t IER;
  __IO uint32_t ESR;
  __IO uint32_t BTR;
  uint32_t  RESERVED0[88];
  CAN_TxMailBox_TypeDef sTxMailBox[3];
  CAN_FIFOMailBox_TypeDef sFIFOMailBox[2];
  uint32_t  RESERVED1[12];
  __IO uint32_t FMR;
  __IO uint32_t FM1R;
  uint32_t  RESERVED2;
  __IO uint32_t FS1R;
  uint32_t  RESERVED3;
  __IO uint32_t FFA1R;
  uint32_t  RESERVED4;
  __IO uint32_t FA1R;
  uint32_t  RESERVED5[8];
#ifndef STM32F10X_CL                                //  条件编译
  CAN_FilterRegister_TypeDef sFilterRegister[14];
#else
  CAN_FilterRegister_TypeDef sFilterRegister[28];
#endif /* STM32F10X_CL */  
} CAN_TypeDef;

	CAN_FilterInitTypeDef  CAN_FilterInitStructure;
    CAN_FilterInitStructure.CAN_FilterNumber=0;	  //过滤器0
  	CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask; 
  	CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit; //32位 
  	CAN_FilterInitStructure.CAN_FilterIdHigh=0x0000;32位ID
  	CAN_FilterInitStructure.CAN_FilterIdLow=0x0000;
  	CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;//32位MASK
  	CAN_FilterInitStructure.CAN_FilterMaskIdLow=0x0000;
   	CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_Filter_FIFO0;//过滤器0关联到FIFO0
  	CAN_FilterInitStructure.CAN_FilterActivation=ENABLE; //激活过滤器0
  	CAN_FilterInit(&CAN_FilterInitStructure);//滤波器初始化